Racquet-shaped.–Used of feathers with bare shafts and roundish terminal vanes.
Rectrices and Remiges.–See Coverts, Primaries and Secondaries. The Rectrices usually number twelve, but vary from four to twenty-eight.
Reticulated (p. [10]).
Rictal.–Belonging to the gape.
Roofed.–See Vaulted.
Sagittate.–Used of the tongue, and meaning arrow-shaped.
Scapulars.–The feathers lying along the scapulae or shoulder-blades.
Scutellated (p. [10]).
Secondaries or Cubitals.–Those wing-quills (Remiges) borne by the Ulna, which often exhibit roughnesses where they grow. They should properly be counted inwards from the wrist, and vary from six to thirty or more.
Spatulate.–Spoon-shaped. Used of the bill or of racquet-shaped feathers.